.app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: #f7f7f7;
  }
  
  .top {
    flex: 0;
    border-bottom: solid 1px var(--adm-border-color);
  }
  
  .body {
    flex: 1;
    /* display: flex; */
    /* justify-content: center;
    align-items: center; */
    height: calc(100% - 50px);
    overflow-y: auto;
    position: relative;
    // overflow: hidden;
  }
  
  .bottom {
    flex: 0;
    border-top: solid 1px var(--adm-border-color);
  }